如何在打字稿中获取枚举值

Question

I have a problem with getting values from enum. Here is the snippet of my code:

export const enum ComplianceType {
  ENGINEER_ASSESMENT = 'ENGINEER_ASSESMENT',
  CONSTRUCTION_COMPLIANCE = 'CONSTRUCTION_COMPLIANCE',
  ARCHITECTURE_ASSIGNMENT = 'ARCHITECTURE_ASSIGNMENT',
  BLUEPRINT_APPROVAL = 'BLUEPRINT_APPROVAL',
  THERMAL_COMPLIANCE = 'THERMAL_COMPLIANCE',
  ELECTRICITY_COMPLIANCE = 'ELECTRICITY_COMPLIANCE',
  TELECOMUNICATION_COMPLIANCE = 'TELECOMUNICATION_COMPLIANCE',
  WATER_COMPLIANCE = 'WATER_COMPLIANCE',
  OTHER_1 = 'OTHER_1',
  OTHER_2 = 'OTHER_2',
}

in my .ts file:

import { ICompliance, ComplianceType } from 'app/shared/model/compliance.model';

And i tried this one:

complianceTypeList: ComplianceType;

I don't get how to get values from enum in typescript. Any advice ?

Answer 1

Your syntax is wrong.

You should not assign it, or try to assign Enums as variables. Just export enum ComplianceType will do.

export enum ComplianceType {
  ENGINEER_ASSESMENT = 'ENGINEER_ASSESMENT',
  CONSTRUCTION_COMPLIANCE = 'CONSTRUCTION_COMPLIANCE',
  ARCHITECTURE_ASSIGNMENT = 'ARCHITECTURE_ASSIGNMENT',
  BLUEPRINT_APPROVAL = 'BLUEPRINT_APPROVAL',
  THERMAL_COMPLIANCE = 'THERMAL_COMPLIANCE',
  ELECTRICITY_COMPLIANCE = 'ELECTRICITY_COMPLIANCE',
  TELECOMUNICATION_COMPLIANCE = 'TELECOMUNICATION_COMPLIANCE',
  WATER_COMPLIANCE = 'WATER_COMPLIANCE',
  OTHER_1 = 'OTHER_1',
  OTHER_2 = 'OTHER_2',
}

From there, you can simply import the Enums on the Class, or component, that requires it.

import { ComplianceType } from 'app/shared/model/compliance.model';

Works perfectly fine over here .

Answer 2

You can access an Enum value by treating it like an array and accessing its value by using the key:

ComplianceType["ARCHITECTURE_ASSIGNMENT"]

Should give you the value.

Answer 3

You can use Object.keys(EnumType); if you want to access the keys of your enums, or Object.values(EnumType); if you want to have access to its values. Nevertheless, it looks like you are trying to assign an entire Enum to a single Enum property type here

You can do this:

complianceType: ComplianceType;

complianceType = ComplianceType.ENGINEER_ASSESMENT;

But you can't assign a type to a variable of this type, basically. That does not make sens.